冒泡排序

Posted 2020-12-06 joker-dj

public class demo {
public static void main(String[] args) {
//定义一个数组
int[] arr = {12, 15, 10, 18, 11};
System.out.println("排序前" + ArrayToString(arr));

    for (int i = 0; i < arr.length-1; i++) {
        for (int j = 0; j < arr.length-1-i; j++) {
            if (arr[j]>arr[j+1]){
                int temp=arr[j];
                arr[j]=arr[j+1];
                arr[j+1]=temp;
            }
        }
    }
    System.out.println("排序后" + ArrayToString(arr));

}
/*数组转String*/
public static String ArrayToString(int[] arr){
    StringBuilder sb=new StringBuilder();
    sb.append("[");
    for (int i = 0; i < arr.length; i++) {
        if(i==arr.length-1){
            sb.append(arr[i]);
        }else{
            sb.append(arr[i]).append(",");
        }
    }
    sb.append("]");
    String s=sb.toString();
    return s;
}

}